what the hell is a nug i keep hearin people say it but i dunno what it means. im good on most other words its just this one i got trouble with.
1 Improper use of contact lenses or steroid eyedrops can lead to fungal infections, which in turn can cause corneal ulcers. Also, a corneal injury that results in plant material getting into the eye can lead to fungal keratitis.  Acanthamoeba are microscopic, single-celled amoeba that can cause human infection.
Sore eyes can be caused by a variety of things. In most cases they are caused by staring at a computer screen or book for too long. Your eyes may become sore after a long day at work or if you have been deprived of sleep. An incorrect eyeglass prescription may also lead to sore eyes. Additional causes may include: Airborne irritants such as chemicals, smoke, smog, animal dander, and pollen.